official
Unofficial
Yes, it is. It is the opposite of the word formal (not formal), and a synonym of casual or unofficial.
deceeded (unofficial) ((OK, I am the only one who uses this... it is not my fault, there is no good translation for the German unterschreiten...))
when diplomacy becomes strangely unofficial......strangely.......STRANGELY UNOFFICIAL!
the Eupatagus
This is just an unofficial estimate.
Commencement - unofficial - was created in 1999.
The results would be unofficial until they were validated by the judges. It was an unofficial copy of the book, a clear violation of copyright.
when diplomacy becomes strangely unofficial......strangely.......STRANGELY UNOFFICIAL!
Answers given on Answers.com are usually unofficial.
Santana Unofficial Album was created in 1990.
Eve Zibart has written: 'The Unofficial Guide to Branson, Missouri (Frommer's Unofficial Guides)' 'The Unofficial Guide to Washington, D.C. 1997 (Issn 1071-6440)' 'The Unofficial Guide to Washington, D.C. 1996 (Issn 1071-6440)' 'The eclectic gourmet guide to Washington, D.C' -- subject(s): Guidebooks, Restaurants 'The Unofficial Guide to Branson, Missouri (Unofficial Guide to Branson, Missouri, 2nd ed)' 'The Unofficial Guide to New Orleans' 'This Day in Disney History (This Day in History)' 'The Unofficial Guide to Walt Disney World for Grown-Ups (Unofficial Guides)' 'The Unofficial Guide to New Orleans (Unofficial Guide to New Orleans, 2nd ed)' 'The Unofficial Guide to New York City (Unofficial Guide to New York City, 2nd)' 'The Unofficial Guide to New York City (Unofficial Guides)' 'The Unofficial Guide to Walt Disney World for Grown-Ups' 'The Unofficial Guide(r) to Washington, D.C.'